\(\left(3x+2\right)^6=\left(3x+2\right)^4\)
\(=>\left(3x+2\right)^6-\left(3x+2\right)^4=0\)
\(=>\left(3x+2\right)^4.\left(3x+2\right)^2-\left(3x+2\right)^4=0\)
\(=>\left(3x+2\right)^4-\left[\left(3x+2\right)^2-1\right]=0\)
=>(3x+2)4=0 hoặc (3x+2)2-1=0
<=>3x+2=0 hoặc (3x+2)2=1
<=>3x=-2 hoặc 3x+2=-1 hoặc 3x+2=1
<=>x=-2/3 hoặc x=-1 hoặc x=-1/3
Vậy.............
bài 1:tìm x , biết
a,55-4x-4(-x+3)=6-2(-8-3x)
b,-5(-2x-6)-9(4-7x)=51-3x+6(x-9)
c,93+/6-3x/-39=231
tìm x
a) x/7 = 6/21
b)2/3x -1/2=1/10
c)1/4+1/3 : x = -5
d)3x+17=2
đ)2/3x +1/4 =7/12
2x+3/10= 11/6 . 6/11
x : 4 1/3 = -2,5
Tìm số nguyên x, biết
a) x – 2 = -6
b)15 – (x – 7) = -21
c)4.(3x – 4) – 2 = 18
d) (3x – 6) + 3 = 32
e) (3x – 6) . 3 = 32
f) (3x – 6) : 3 = 32
g) (3x – 6) - 3 = 32
h) (3x -2 mũ4 ).7mũ3 = 2.7mũ4
i) |x| = |-7| k) |x+1| = 2
l)|x – 2| = 3
m) x +|-2| = 0
o) 72 – 3.|x + 1| = 9
p) |x+1| = 3 và x+1< 0
q) (x – 2).(x + 4) = 0
tìm x thuộc Z
a) 3x-4=-2x+5
b) 3(-4-2x) =3x+6
c) /3x-2/=2x-1
Tìm x,y thuộc Z biết
a.(x-1).(2y-4)=0
b.(3x-2).(y-3)=6
c.(3x-4).(2y-1)=2
d.2xy-3x-2y+8=0
B3 : tìm x biết
a, x + 3/4 = 1/4
b, 2/3x - 3/7 = 1/7
c, 1 2/3x - 50%x = - 1 1/6
tìm x biết: 4+1/3x (1/6-1/2)<= x<= 2/3x (1/3-1/2-3/4)
Tìm x biết:
a) 12 ( 2x - 6 ) - 43= 5^3
b) 7 ( 25 - 3x ) = 3^4 - 2^5
c) ( 3x - 5 ) + 3^4 = 6^0 = 5^3
d) 3x + 2x ( 2^3 . 5 - 3^2 . 4 ) + 5^2 = 4^4
e) 720 : [ 41 - (2x - 5 ) ] = 2^3 .5
tìm x
a) 5/8 - x = 2 1/6
b) 4/9 : x = -1/3+1 1/6
c) (3x-2)^3 = -1 / 27
d)/3x-4/ = 16 1/9 + 18/19
e) /2x + 1/=x+2
